and who else did the fbi suspect? >> randi kaye joins us now live. such a fascinating mystery and it's been one now for more than 20 years. what about that security guard you heard in that interview. do investigators think he had anything to do with the heist? >> reporter: anderson, to this day, not a single museum employee has been charged in connection with the crime. but not one of them has been fully cleared, either. that's the thing. the guards' role to this point is really unclear. was it an inside job or was he perhaps just careless? because he told us that he used to complain about the lax security at the museum in public. so anyone could have overheard him, maybe they jumped on the opportunity. and here's the kicker, anderson. it has been so long, so many years have passed, that the statute of limitations has run out. so even if it was that guard, we interviewed or anyone else, the thieves can no longer be charged. and anderson, just this week the fbi said that they finally know after 23 years who did this. they're not naming the suspects, b